I really like the concept! However I think your landing page could use some work. The call to action (Registering) isn't as clear as it could be. What I would do is add a big button 'register' and ask the user to pick a way to register after that. At first glance the facebook logo could just be a link to your facebook page or something.

Also you need some way to lure people in, some screenshots, a short video. I want to know in what state of development a service is before I sign up!

Hope this helps in any way :)